Some paillier bits

static/js/paillier.js

@@ -1,9 +1,23 @@
 let p, q, pubKey, privKey;
 
 class PubKey {
-    constructor(n, g) {
-        this.n = n;
-        this.g = g;
+    constructor(p, q) {
+        this.n = p * q;
+        this.g = this.n + 1n;
+    }
+
+    encrypt(m) {
+        // Compute g^m r^n mod n^2
+        let r = this.n;
+
+        while (r >= n) {
+            r = random2048();
+        }
+
+        // Compute g^m by binomial theorem.
+        let gm = 1n + this.n * m;
+        // Compute g^m r^n from fact that g^n = 1
+        return fastModularExponentiation(gm * r, this.n, this.n ** 2);
     }
 }
 
@@ -23,6 +37,6 @@ document.addEventListener("DOMContentLoaded", () => {
     let n = p * q;
     let lambda = (p - 1n) * (q - 1n);
 
-    pubKey = new PubKey(n, n + 1n);
+    pubKey = new PubKey(p, q);
     privKey = new PrivKey(lambda, fastModularExponentiation(lambda, lambda - 1n, n));
 });

static/js/player.js

@@ -69,13 +69,6 @@ class Player {
         this.isPlaying = true;
     }
 
-    /**
-     * Perform some game action on your turn.
-     *
-     * @param data Data received via socket.
-     */
-    perform(data) {}
-
     /**
      * End player's turn
      */

static/js/random.js

@@ -4,7 +4,7 @@ class RandomSession {
         this.cipherTexts = {};
         this.cipherKeys = {};
         this.ourKey = CryptoJS.lib.WordArray.random(32).toString();
-        // 32-bit as JavaScript does funny stuff at 64-bit levels.
+        // 32-bit as JavaScript does funny stuff at 53-bit levels.
         this.ourNoise = CryptoJS.lib.WordArray.random(4);
         this.finalValue = null;
         this.resolvers = [];